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2 Sheets-Shee1; 1.

(No Model.)

H. J. WEGKAUF. COLOR GRINDING MACHINE.

(No Model.) Z'Sheets-Sheet 2'. H. J. WEOKAUF.

COLOR GRINDING MACHINE. I I N0. 477K722. Patented June 28, 1892 E xi "HM L I EMU/v 0703.5?4 Mcfidu WJZWESSES r j JJVVE/VIOZ? we nonms PETERSco., moro-umo WASHINGTON a c U vrrnn Srn'rns ATENT FFICEO HERMANN JOSEPHWVECKAUF, OF RHEYDT, GERMANY.

COLOR-GRINDING MACHINE.

SPECIFICATION forming part of Letters Fatent No. 477,722, dated June 28,1892. Application filed October 16, l89 l. Serial No. 408,983- (Nomodel.)

To ctZZ 1072,0722, it may concern:

Beitknown that I, HERMANN JOSEPH WEoK- AUF, a subject of the GermanEmperor, residing at Rheydt, in Rhenish Prussia, Empire of Germany, haveinvented certain new and useful Improvements in Color-Grinding Machines;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to improvements in color-grinding machines; and itconsists in the peculiar construction, certain novel combinations, andthe adaptation of parts hereinafter described, and particularly pointedout in the claim appended.

Referring to the accompanying drawings, Figure l is a perspective Viewof my new and improved color-grinding machine. Fig.2 is a centralvertical sectional view of the same. Fig. 3 is a side elevation of theopposite side to that shown in Fig. 1. Fig. 4 illustrates in detail, onan enlarged scale, one of the reciprocating devices which cause thelower grinding-rollers to reciprocate laterally as they revolve,together with a portion of the driveshaft and one of the cam-wheels.

Referring to the several parts by their designating numerals andletters, 1 indicates the supportingframe of my new and improvedcolor-grinding machine, in the upper part of which are mounted the twoupper grindingrollcrs 2 2. The ends of the shafts 3 of these rollers aremounted in bearing-blocks 4, which are adj ustably mounted in the upperpart of the frame 1. 5 indicates adj usting-screws, which passhorizontally through bearings in the upper part of the frame and havetheir inner ends swiveled in the bearing-blocks 4. It will be seen thatby turning these screws 5 the grindingrollers can be adjusted so as toregulate the distance between them, which is always very small, so thatthey will better grind the colors. The funnel or hopper 6, in which thecolor to be ground is contained, converges toward its open lower end,where it is shaped to conform to the two upper grinding-rollers. To theouter side of the hopper, near its upper end, are bolted theoutwardly-extendin g irons 7, through which pass the upper ends ofvertical rods 8 8, which rise rollers, which are mounted in the elevatedposition shown, the ends of their shafts 11 passing throughbearing-blocks 12, which can be adjusted by means of adjllSlllllg-SCIGWS 13 in the same manner that the upper rollers areadjusted to regulate the space between the upper and lowergrinding-rollers.

14 indicates the drive-shaft, which may be revolved by a belt from anysuitable source of power, passing around a large band-wheel (notillustrated) on its end. Upon the same end of the drive-shaft is keyed alarge cogwheel 16, which meshes with a smaller cogwheel 17 on that endof one of the lower roller shafts 11. On the other end of thedrive-sl1aft is keyed a gear'wheel 18, which meshes with a gear-wheel18,keyed on the end of one of the upper roller shafts 3. Keyed on theupper roller shafts 3 are gear-wheels 19, which are preferably of acorresponding diameter and mesh with each other, as illustrated. Thegear-wheel 1S meshes with a pinion 22 on one of the lower roller shafts11, as illustrated. By the arrangement of the gearing as set forth itwill be readily perceived that the lower grinding-rollers 10 will berevolved at a higher rate of speed than the upper rollers 2, which isdesirable for a purpose presently set forth.

Loosely mounted on the lower roller shafts 11, which are provided withcollars 30, as illustrated, are the branches of the pivoted andbifurcated arms A, which are fixedly connected to or formed integralwith the vertical angular branches a of the longitudinally-disposedshafts B, which branches a are journaled in bearings upon the sides ofthe machine. The longitudinally-disposed shafts B have their inner endsslotted,'as at O, to straddle the curvilinear cam-wheels D, which arefixedly mounted upon the main drive-shaft 14, asbetter illustrated inFig. 4. of the drawings. By this construction it will be readilyperceived that when the main drive-shaft. is rotated the longitudinalshafts B will be rocked, and through the medium of the bi- IOO furcatedcastings A and the laterally-swinging shafts B the shafts 11 of thelower'grinding-rollers will be laterally reciprocated, thus facilitatingthe grinding of the stock. It will now be seen that the color placed inthe hopper 6'will pass first to the upper grindingrollers 2, betweenwhich it is ground, and is taken from these upper rollers by the lowergrinding-rollers 10. As these lower rollers revolve at a higher speedthan the upper rollers and have, moreover, the longitudinal movementfrom side to side, they will effectively remove the ground color fromthe upper rollers as they come in contact with the same. As the lowerrollers 10, revolving at a high rate of speed, come in contact with theupper rollers they grind the color still finer, and owing to the lateralreciprocating movement which the rollers 10 are given by the novelmechanism above described, and illustrated in detail in Fig. 4 of thedrawings, the color will be ground still finer and will be morethoroughly mixed than is possible with the ordinary revolving grinding-rollers now in use. By having the two upper rollers both taking thecolor at the same time from the feed-hopper and the two lower rollersacting in conjunction with these upper rollers the capacity of themachine is doubled.

The ground color is taken from the lower rollers 10 by the curvedscraping-blades 23, which are mounted at their lower ends on thetransverse pivots 24. On the ends of these shafts are secured the arms25, formed from spring metal, through the lower ends of which pass thetension-screws 26, the inner ends of which bear against the legs of thesupporting-frame. It will now be seen that by turning thesetension-screws the shafts 24 will be turned in their hearings to pressthe beveled upper edges of the curved scraping-blades 23 against thesurface of the revolving grindingthe ground color from the lower rollers10, and 7 it then falls down into the wide shallow inclined troughs 27,from which it can be received in suitable receptacles. It will be seenthat by turning the tension-screws 26 the beveled upper edges of thescraping-blades can always be kept in close contact with the lowergrinding-rollers 10 and the pressure of the upper edges of the bladesagainst the rollers can be regulated, as required. The spring-arms 25Will hold the scraping-blades with a springpressure against thegrinding-rollers.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

In a paint-grinding machine, the combination, with the drive-shaft, thecurvilinear camwheel fixed thereon, a grinding-roller, a collar fixed onthe shaft of said roller adjacent to the end thereof, and gearingintermediate of the drive-shaftand grinding-roller, adapted to transmitrotary motion from the former to the latter, of the longitudinalrock-shaft B, having its inner end slotted and straddling thecurvilinear cam on the drive-shaft, the bifurcated arm A, straddling theroller-shaft and engaging the collar thereon, and the verticallydisposedbranch (1, journaled in suitable bearings and connecting the shaft B andarm A, substantially as and for the purpose specified.

In testimony whereof I affix my signature in presence of two witnesses.

IIERMANN JOSEPH WECKAUF. [L. 8.]

Witnesses:

EVANS BLAKE, W. A. BLAKE.

